<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script src="index.js"></script>
<script>
    let vm = new Vue({
      data:{
        message:'hello vue.js',
        person:{
          name:'zs'
        }
      }
    })
    vm.person.name = 'ls'
</script>
</body>
</html>